Lithiation of 2-(1-Chloroethyl)-2-oxazolines: Synthesis of Substituted Oxazolinyloxiranes and Oxazolinylaziridines
作者:Vito Capriati、Leonardo Degennaro、Saverio Florio、Renzo Luisi、Carmela Tralli、Luigino Troisi
DOI:10.1055/s-2001-18447
日期:——
Lithiation of 2-(1-chloroethyl)-4,4-dimethyl-2-oxazoline 2 leads to lithiated derivative 3, which is quite stable and can be deuterated, methylated and silylated to give oxazolines 4a-c. The reaction of 3 with carbonyl compounds and imines furnishes good to excellent yields of oxazolinylepoxides 6a-m and aziridines 17a-f, respectively. Methylation and NaBH4 reduction of epoxides 6 afford oxazolidines
2-(1-氯乙基)-4,4-二甲基-2-恶唑啉2的锂化得到锂化衍生物3,它非常稳定,可以被氘化、甲基化和甲硅烷基化得到恶唑啉4a-c。3 与羰基化合物和亚胺的反应分别提供了良好至优异的恶唑啉基环氧化物 6a-m 和氮丙啶 17a-f 产率。环氧化物 6 的甲基化和 NaBH4 还原得到高度立体选择性的恶唑烷 7。酰基环氧化物可以通过恶唑烷部分的水解获得。